!12783 翻译完成 11703+11663+11650+11638+11570+11499+10778+12208

Merge pull request !12783 from ester.zhou/TR-11703

en/application-dev/reference/apis/js-apis-accessibility-GesturePath.md

+# @ohos.accessibility.GesturePath
+
+ The **GesturePath** module provides APIs for creating gesture path information required for an accessibility application to inject gestures.
+
+> **NOTE**
+>
+> The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+## Modules to Import
+
+```ts
+import GesturePath from '@ohos.accessibility.GesturePath';
+```
+
+## GesturePath
+
+Defines a gesture path.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+### Attributes
+
+| Name          | Type                                    | Readable  | Writable  | Description    |
+| ------------ | ---------------------------------------- | ---- | ---- | ------ |
+| points       | Array<[GesturePoint](js-apis-accessibility-GesturePoint.md#gesturepoint)> | Yes   | Yes   | Gesture touch point.   |
+| durationTime | number                                   | Yes   | Yes   | Total gesture duration, in milliseconds.|
+
+### constructor
+
+constructor(durationTime: number);
+
+Constructor used to create a **GesturePath** object.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| durationTime | number | Yes| Total gesture duration, in milliseconds.|
+
+**Example**
+
+```ts
+let gesturePath = new GesturePath.GesturePath(20);
+```

en/application-dev/reference/apis/js-apis-accessibility-GesturePoint.md

+# @ohos.accessibility.GesturePoint
+
+ The **GesturePoint** module provides APIs for creating gesture touch point information required for an accessibility application to inject gestures.
+
+> **NOTE**
+>
+> The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+## Modules to Import
+
+```ts
+import GesturePoint from '@ohos.accessibility.GesturePoint';
+```
+
+## GesturePoint
+
+Defines a gesture touch point.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+### Attributes
+
+| Name       | Type  | Readable  | Writable  | Description     |
+| --------- | ------ | ---- | ---- | ------- |
+| positionX | number | Yes   | Yes   | X coordinate of the touch point.|
+| positionY | number | Yes   | Yes   | Y coordinate of the touch point.|
+
+### constructor
+
+constructor(positionX: number, positionY: number);
+
+Constructor used to create a **GesturePoint** object.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| positionX | number | Yes| X coordinate of the touch point.|
+| positionY | number | Yes | Y coordinate of the touch point.|
+
+**Example**
+
+```ts
+let gesturePoint = new GesturePoint.GesturePoint(1, 2);
+```

en/application-dev/reference/apis/js-apis-accessibility-config.md

-# System Accessibility Configuration
+# @ohos.accessibility.config
 
-The **config** module allows you to configure system accessibility features, including accessibility extension, high-contrast text, mouse buttons, and captions.
+The System Accessibility Configuration module allows you to configure system accessibility features, including accessibility extension, high-contrast text, mouse buttons, and captions.
 
 > **NOTE**
 >
-> The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
->
-> The APIs provided by this module are system APIs.
+> - The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+> - The APIs provided by this module are system APIs.
 
 ## Modules to Import
 
-```typescript
-import config from "@ohos.accessibility.config";
+```ts
+import config from '@ohos.accessibility.config';
 ```
 
 ## Attributes
@@ -22,20 +21,20 @@ import config from "@ohos.accessibility.config";
 | -------- | -------- | -------- | -------- | -------- |
 | highContrastText | [Config](#config)\<boolean>| Yes| Yes| Whether to enable high-contrast text.|
 | invertColor | [Config](#config)\<boolean>| Yes| Yes| Whether to enable color inversion.|
-| daltonizationColorFilter | [Config](#config)\<[DaltonizationColorFilter](#daltonizationcolorfilter)>| Yes| Yes| Daltonization filter. |
+| daltonizationColorFilter | [Config](#config)&lt;[DaltonizationColorFilter](#daltonizationcolorfilter)&gt;| Yes| Yes| Configuration of the daltonization filter.|
 | contentTimeout | [Config](#config)\<number>| Yes| Yes| Recommended duration for content display. The value ranges from 0 to 5000, in milliseconds.|
-| animationOff | [Config](#config)\<boolean>| Yes| Yes| Whether to enable animation.|
+| animationOff | [Config](#config)\<boolean>| Yes| Yes| Whether to disable animation.|
 | brightnessDiscount | [Config](#config)\<number>| Yes| Yes| Brightness discount. The value ranges from 0 to 1.0.|
 | mouseKey | [Config](#config)\<boolean>| Yes| Yes| Whether to enable the mouse button feature.|
-| mouseAutoClick | [Config](#config)\<number>| Yes| Yes| Interval for the automatic mouse clicks. The value ranges from 0 to 5000, in milliseconds.|
+| mouseAutoClick | [Config](#config)\<number>| Yes| Yes| Interval for automatic mouse clicks. The value ranges from 0 to 5000, in milliseconds.|
 | shortkey | [Config](#config)\<boolean>| Yes| Yes| Whether to enable the accessibility extension shortcut key.|
-| shortkeyTarget | [Config](#config)\<string>| Yes| Yes| Target application for the accessibility extension shortcut key. The value format is bundleName/abilityName.|
+| shortkeyTarget | [Config](#config)\<string>| Yes| Yes| Target application for the accessibility extension shortcut key. The value format is 'bundleName/abilityName'.|
 | captions | [Config](#config)\<boolean>| Yes| Yes| Whether to enable captions.|
-| captionsStyle | [Config](#config)\<[accessibility.CaptionsStyle](./js-apis-accessibility.md#captionsstyle8)>| Yes| Yes| Captions style.|
+| captionsStyle | [Config](#config)\<[accessibility.CaptionsStyle](js-apis-accessibility.md#captionsstyle8)>| Yes| Yes| Captions style.|
 
 ## enableAbility
 
-enableAbility(name: string, capability: Array&lt;[accessibility.Capability](./js-apis-accessibility.md#capability)&gt;): Promise&lt;void&gt;;
+enableAbility(name: string, capability: Array&lt;accessibility.Capability&gt;): Promise&lt;void&gt;;
 
 Enables an accessibility extension ability. This API uses a promise to return the result.
 
@@ -45,29 +44,44 @@ Enables an accessibility extension ability. This API uses a promise to return th
 
 | Name| Type| Mandatory| Description|
 | -------- | -------- | -------- | -------- |
-| name | string | Yes| Name of the accessibility extension ability. The format is bundleName/abilityName.|
-| capability | Array&lt;[accessibility.Capability](./js-apis-accessibility.md#capability)&gt;) | Yes| Capability of the accessibility extension ability.|
+| name | string | Yes| Name of the accessibility extension ability. The format is 'bundleName/abilityName'.|
+| capability | Array&lt;[accessibility.Capability](js-apis-accessibility.md#capability)&gt; | Yes| Capability of the accessibility extension ability.|
 
 **Return value**
 
 | Type| Description|
 | -------- | -------- |
-| Promise&lt;void&gt; | Promise used to return the execution result.|
+| Promise&lt;void&gt; | Promise that returns no value.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300001 | Invalid bundle name or ability name.  |
+| 9300002 | Target ability already enabled. |
 
 **Example**
 
-  ```typescript
-  config.enableAbility("com.ohos.example/axExtension", ['retrieve'])
-      .then(() => {
-        console.info('enable succeed');
-      }).catch((error) => {
-        console.error('enable failed');
-      });
-  ```
+```ts
+import accessibility from '@ohos.accessibility';
+let name = 'com.ohos.example/axExtension';
+let capability : accessibility.Capability[] = ['retrieve'];
+try {
+    config.enableAbility(name, capability).then(() => {
+      console.info('enable ability succeed');
+    }).catch((err) => {
+      console.error('failed to enable ability, because ' + JSON.stringify(err));
+    });
+} catch (exception) {
+    console.error('failed to enable ability, because ' + JSON.stringify(exception));
+};
+```
 
 ## enableAbility
 
-enableAbility(name: string, capability: Array&lt;[accessibility.Capability](./js-apis-accessibility.md#capability)&gt;, callback: AsyncCallback&lt;void&gt;): void;
+enableAbility(name: string, capability: Array&lt;accessibility.Capability&gt;, callback: AsyncCallback&lt;void&gt;): void;
 
 Enables an accessibility extension ability. This API uses an asynchronous callback to return the result.
 
@@ -77,21 +91,37 @@ Enables an accessibility extension ability. This API uses an asynchronous callba
 
 | Name| Type| Mandatory| Description|
 | -------- | -------- | -------- | -------- |
-| name | string | Yes| Name of the accessibility extension ability. The format is bundleName/abilityName.|
-| capability | Array&lt;[accessibility.Capability](./js-apis-accessibility.md#capability)&gt; | Yes| Capability of the accessibility extension ability.|
-| callback | AsyncCallback&lt;void&gt; | Yes| Callback used to return the execution result.|
+| name | string | Yes| Name of the accessibility extension ability. The format is 'bundleName/abilityName'.|
+| capability | Array&lt;[accessibility.Capability](js-apis-accessibility.md#capability)&gt; | Yes| Capability of the accessibility extension ability.|
+| callback | AsyncCallback&lt;void&gt; | Yes| Callback used to return the result.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300001 | Invalid bundle name or ability name.  |
+| 9300002 | Target ability already enabled. |
 
 **Example**
 
-  ```typescript
-  config.enableAbility("com.ohos.example/axExtension", ['retrieve'], (err, data) => {
-      if (err) {
-          console.error('enable failed');
-          return;
-      }
-      console.info('enable succeed');
-    })
-  ```
+```ts
+import accessibility from '@ohos.accessibility';
+let name = 'com.ohos.example/axExtension';
+let capability : accessibility.Capability[] = ['retrieve'];
+try {
+    config.enableAbility(name, capability, (err) => {
+        if (err) {
+            console.error('failed to enable ability, because ' + JSON.stringify(err));
+            return;
+        }
+        console.info('enable ability succeed');
+    });
+} catch (exception) {
+    console.error('failed to enable ability, because ' + JSON.stringify(exception));
+};
+```
 
 ## disableAbility
 
@@ -105,24 +135,36 @@ Disables an accessibility extension ability. This API uses a promise to return t
 
 | Name| Type| Mandatory| Description|
 | -------- | -------- | -------- | -------- |
-| name | string | Yes| Name of the accessibility extension ability. The format is bundleName/abilityName.|
+| name | string | Yes| Name of the accessibility extension ability. The format is 'bundleName/abilityName'.|
 
 **Return value**
 
 | Type| Description|
 | -------- | -------- |
-| Promise&lt;void&gt; | Promise used to return the execution result.|
+| Promise&lt;void&gt; | Promise that returns no value.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300001 | Invalid bundle name or ability name.  |
 
 **Example**
 
-  ```typescript
-  config.disableAbility("com.ohos.example/axExtension")
-      .then(() => {
-        console.info('disable succeed');
-      }).catch((error) => {
-        console.error('disable failed');
-      });
-  ```
+```ts
+let name = 'com.ohos.example/axExtension';
+try {
+    config.disableAbility(name).then(() => {
+      console.info('disable ability succeed');
+    }).catch((err) => {
+      console.error('failed to disable ability, because ' + JSON.stringify(err));
+    });
+} catch (exception) {
+    console.error('failed to disable ability, because ' + JSON.stringify(exception));
+};
+```
 
 ## disableAbility
 
@@ -136,26 +178,39 @@ Disables an accessibility extension ability. This API uses an asynchronous callb
 
 | Name| Type| Mandatory| Description|
 | -------- | -------- | -------- | -------- |
-| name | string | Yes| Name of the accessibility extension ability. The format is bundleName/abilityName.|
-| callback | AsyncCallback&lt;void&gt; | Yes| Callback used to return the execution result.|
+| name | string | Yes| Name of the accessibility extension ability. The format is 'bundleName/abilityName'.|
+| callback | AsyncCallback&lt;void&gt; | Yes| Callback used to return the result.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300001 | Invalid bundle name or ability name.  |
 
 **Example**
 
-  ```typescript
-  config.disableAbility("com.ohos.example/axExtension", (err, data) => {
-      if (err) {
-          console.error('disable failed');
-          return;
-      }
-      console.info('disable succeed');
-    })
-  ```
+```ts
+let name = 'com.ohos.example/axExtension';
+try {
+    config.disableAbility(name, (err, data) => {
+        if (err) {
+            console.error('failed to enable ability, because ' + JSON.stringify(err));
+            return;
+        }
+        console.info('disable succeed');
+    });
+} catch (exception) {
+    console.error('failed to enable ability, because ' + JSON.stringify(exception));
+};
+```
 
-## on('enableAbilityListsStateChanged')
+## on('enabledAccessibilityExtensionListChange')
 
-on(type: 'enableAbilityListsStateChanged', callback: Callback&lt;void&gt;): void;
+on(type: 'enabledAccessibilityExtensionListChange', callback: Callback&lt;void&gt;): void;
 
-Adds a listener for changes in the list of enabled accessibility extension abilities.
+Adds a listener for changes in the list of enabled accessibility extension abilities. This API uses an asynchronous callback to return the result.
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
@@ -163,22 +218,27 @@ Adds a listener for changes in the list of enabled accessibility extension abili
 
 | Name| Type| Mandatory| Description|
 | -------- | -------- | -------- | -------- |
-| type | string | Yes| Listening type. The value is fixed at **'enableAbilityListsStateChanged'**, indicating the changes in the list of enabled accessibility extension abilities. |
+| type | string | Yes| Listening type. The value is fixed at **'enabledAccessibilityExtensionListChange'**, indicating listening for changes in the list of enabled accessibility extension abilities.|
 | callback | Callback&lt;void&gt; | Yes| Callback invoked when the list of enabled accessibility extension abilities changes.|
 
 **Example**
 
-  ```typescript
-  config.on('enableAbilityListsStateChanged',() => {
-      console.info('ax extension ability enable list changed');
-  });
-  ```
+```ts
+try {
+    config.on('enabledAccessibilityExtensionListChange', () => {
+        console.info('subscribe enabled accessibility extension list change state success');
+    });
+} catch (exception) {
+    console.error('failed to subscribe enabled accessibility extension list change state, because ' +
+    JSON.stringify(exception));
+};
+```
 
-## off('enableAbilityListsStateChanged')
+## off('enabledAccessibilityExtensionListChange')
 
-off(type: 'enableAbilityListsStateChanged', callback?: Callback&lt;void&gt;): void;
+off(type: 'enabledAccessibilityExtensionListChange', callback?: Callback&lt;void&gt;): void;
 
-Cancels the listener for changes in the list of enabled accessibility extension abilities.
+Cancels the listener for changes in the list of enabled accessibility extension abilities. This API uses an asynchronous callback to return the result.
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
@@ -186,14 +246,21 @@ Cancels the listener for changes in the list of enabled accessibility extension
 
 | Name| Type| Mandatory| Description|
 | -------- | -------- | -------- | -------- |
-| type |  string | No| Listening type. The value is fixed at **'enableAbilityListsStateChanged'**, indicating the changes in the list of enabled accessibility extension abilities. |
+| type |  string | Yes| Listening type. The value is fixed at **'enabledAccessibilityExtensionListChange'**, indicating listening for changes in the list of enabled accessibility extension abilities.|
 | callback | Callback&lt;void&gt; | No| Callback invoked when the list of enabled accessibility extension abilities changes.|
 
 **Example**
 
-  ```typescript
-  config.off('enableAbilityListsStateChanged');
-  ```
+```ts
+try {
+    config.off('enabledAccessibilityExtensionListChange', () => {
+        console.info('Unsubscribe enabled accessibility extension list change state success');
+    });
+} catch (exception) {
+    console.error('failed to Unsubscribe enabled accessibility extension list change state, because ' +
+    JSON.stringify(exception));
+};
+```
 
 ## Config
 
@@ -203,7 +270,7 @@ Implements configuration, acquisition, and listening for attributes.
 
 set(value: T): Promise&lt;void&gt;;
 
-Sets this attribute. This API uses a promise to return the result.
+Sets the attribute value. This API uses a promise to return the result.
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
@@ -217,24 +284,28 @@ Sets this attribute. This API uses a promise to return the result.
 
 | Type| Description|
 | -------- | -------- |
-| Promise&lt;void&gt; | Promise used to return the execution result.|
+| Promise&lt;void&gt; | Promise that returns no value.|
 
 **Example**
 
-  ```typescript
-  config.highContrastText.set(true)
-      .then(() => {
-        console.info('highContrastText set succeed');
-      }).catch((error) => {
-        console.error('highContrastText set failed');
-      });
-  ```
+```ts
+let value = true;
+try {
+    config.highContrastText.set(value).then(() => {
+        console.info('set highContrastText succeed');
+    }).catch((err) => {
+        console.error('failed to set highContrastText, because ' + JSON.stringify(err));
+    });
+} catch (exception) {
+    console.error('failed to set config, because ' + JSON.stringify(exception));
+};
+```
 
 ### set
 
 set(value: T, callback: AsyncCallback&lt;void&gt;): void;
 
-Sets this attribute. This API uses an asynchronous callback to return the result.
+Sets the attribute value. This API uses an asynchronous callback to return the result.
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
@@ -243,25 +314,30 @@ Sets this attribute. This API uses an asynchronous callback to return the result
 | Name| Type| Mandatory| Description|
 | -------- | -------- | -------- | -------- |
 | value | T | Yes| Attribute value to set.|
-| callback | AsyncCallback&lt;void&gt; | Yes| Callback used to return the execution result.|
+| callback | AsyncCallback&lt;void&gt; | Yes| Callback used to return the result.|
 
 **Example**
 
-  ```typescript
-  config.highContrastText.set(true, (err, data) => {
-      if (err) {
-          console.error('highContrastText set failed');
-          return;
-      }
-      console.info('highContrastText set succeed');
-    })
-  ```
+```ts
+let value = true;
+try {
+    config.highContrastText.set(value, (err, data) => {
+        if (err) {
+            console.error('failed to set highContrastText, because ' + JSON.stringify(err));
+            return;
+        }
+        console.info('set highContrastText succeed');
+    });
+} catch (exception) {
+    console.error('failed to set config, because ' + JSON.stringify(exception));
+};
+```
 
 ### get
 
 get(): Promise&lt;T&gt;;
 
-Obtains the value of this attribute. This API uses a promise to return the result.
+Obtains the attribute value. This API uses a promise to return the result.
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
@@ -269,24 +345,25 @@ Obtains the value of this attribute. This API uses a promise to return the resul
 
 | Type| Description|
 | -------- | -------- |
-| Promise&lt;T&gt; | Promise used to return the attribute value.|
+| Promise&lt;T&gt; | Promise used to return the value obtained.|
 
 **Example**
 
-  ```typescript
-  config.highContrastText.get()
-      .then((value) => {
-        console.info('highContrastText get succeed');
-      }).catch((error) => {
-        console.error('highContrastText get failed');
-      });
-  ```
+```ts
+let value;
+config.highContrastText.get().then((data) => {
+    value = data;
+    console.info('get highContrastText success');
+}).catch((err) => {
+    console.error('failed to get highContrastText, because ' + JSON.stringify(err));
+});
+```
 
 ### get
 
 get(callback: AsyncCallback&lt;T&gt;): void;
 
-Obtains the value of this attribute. This API uses an asynchronous callback to return the result.
+Obtains the attribute value. This API uses an asynchronous callback to return the result.
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
@@ -294,25 +371,27 @@ Obtains the value of this attribute. This API uses an asynchronous callback to r
 
 | Name| Type| Mandatory| Description|
 | -------- | -------- | -------- | -------- |
-| callback | AsyncCallback&lt;void&gt; | Yes| Callback used to return the attribute value.|
+| callback | AsyncCallback&lt;T&gt; | Yes| Callback used to return the attribute value.|
 
 **Example**
 
-  ```typescript
-  config.highContrastText.get((err, data) => {
-      if (err) {
-          console.error('highContrastText get failed');
-          return;
-      }
-      console.info('highContrastText get succeed');
-    })
-  ```
+```ts
+let value;
+config.highContrastText.get((err, data) => {
+    if (err) {
+        console.error('failed to get highContrastText, because ' + JSON.stringify(err));
+        return;
+    }
+    value = data;
+    console.info('get highContrastText success');
+});
+```
 
 ### on
 
 on(callback: Callback&lt;T&gt;): void;
 
-Adds a listener for attribute changes.
+Adds a listener for attribute changes. This API uses an asynchronous callback to return the result.
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
@@ -324,17 +403,21 @@ Adds a listener for attribute changes.
 
 **Example**
 
-  ```typescript
-  config.highContrastText.on(() => {
-      console.info('highContrastText changed');
-  });
-  ```
+```ts
+try {
+    config.highContrastText.on((data) => {
+        console.info('subscribe highContrastText success, result: ' + JSON.stringify(data));
+    });
+} catch (exception) {
+    console.error('failed subscribe highContrastText, because ' + JSON.stringify(exception));
+}
+```
 
 ### off
 
 off(callback?: Callback&lt;T&gt;): void;
 
-Cancels the listener for attribute changes.
+Cancels the listener for attribute changes. This API uses an asynchronous callback to return the result.
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
@@ -342,13 +425,15 @@ Cancels the listener for attribute changes.
 
 | Name| Type| Mandatory| Description|
 | -------- | -------- | -------- | -------- |
-| callback | Callback&lt;T&gt; | No| Callback invoked when the attribute changes.|
+| callback | Callback&lt;T&gt; | No| Callback invoked when the list of enabled accessibility extension abilities changes.|
 
 **Example**
 
-  ```typescript
-  config.highContrastText.off();
-  ```
+```ts
+config.highContrastText.off((data) => {
+    console.info('Unsubscribe highContrastText success, result: ' + JSON.stringify(data));
+});
+```
 
 ## DaltonizationColorFilter
 

en/application-dev/reference/apis/js-apis-accessibility.md

-# Accessibility
+# @ohos.accessibility
 
 The **Accessibility** module implements the accessibility functions, including obtaining the accessibility application list, accessibility application enabled status, and captions configuration.
 
@@ -8,7 +8,7 @@ The **Accessibility** module implements the accessibility functions, including o
 
 ## Modules to Import
 
-```typescript
+```ts
 import accessibility from '@ohos.accessibility';
 ```
 
@@ -49,7 +49,7 @@ Provides information about an accessibility application.
 
 | Name| Type| Readable| Writable| Description|
 | -------- | -------- | -------- | -------- | -------- |
-| id | number | Yes| No| Ability ID.|
+| id | string | Yes| No| Ability ID.|
 | name | string | Yes| No| Ability name.|
 | bundleName | string | Yes| No| Bundle name.|
 | targetBundleNames<sup>9+</sup> | Array&lt;string&gt; | Yes| No| Name of the target bundle.|
@@ -85,7 +85,7 @@ Describes the target action supported by an accessibility application.
 
 ## Capability
 
-Enumerates the capabilities of an auxiliary application.
+Enumerates the capabilities of an accessibility application.
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
@@ -145,7 +145,7 @@ Describes the style of captions.
 
 ## CaptionsManager<sup>8+</sup>
 
-Implements configuration management for captions.
+Implements configuration management for captions. Before calling any API of **CaptionsManager**, you must use the [accessibility.getCaptionsManager()](#accessibilitygetcaptionsmanager8) API to obtain a **CaptionsManager** instance.
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Hearing
 
@@ -156,87 +156,113 @@ Implements configuration management for captions.
 | enabled | boolean | Yes| No| Whether to enable captions configuration.|
 | style | [CaptionsStyle](#captionsstyle8) | Yes| No| Style of captions.|
 
-In the following API examples, you must first use the [accessibility.getCaptionsManager()](#accessibilitygetcaptionsmanager8) API to obtain a **captionsManager** instance, and then call the methods using the obtained instance.
-
 ### on('enableChange')
 
 on(type: 'enableChange', callback: Callback&lt;boolean&gt;): void;
 
-Enables listening for the enabled status changes of captions configuration.
+Enables listening for the enabled status changes of captions configuration. This API uses an asynchronous callback to return the result.
 
-- **Parameters**
+**Parameters**
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | type | string | Yes| Type of the event to listen for, which is set to **enableChange** in this API.|
-  | callback | Callback&lt;boolean&gt; | Yes| Callback invoked when the enabled status of captions configuration changes.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| type | string | Yes| Type of the event to listen for, which is set to **'enableChange'** in this API.|
+| callback | Callback&lt;boolean&gt; | Yes| Callback invoked when the enabled status of captions configuration changes.|
 
-- **Example**
+**Example**
 
-  ```typescript
-  captionsManager.on('enableChange',(data) => {
-      console.info('success data:subscribeStateObserver : ' + JSON.stringify(data))
-  })
-  ```
+```ts
+let captionsManager = accessibility.getCaptionsManager();
+try {
+    captionsManager.on('enableChange', (data) => {
+        console.info('subscribe caption manager enable state change, result: ' + JSON.stringify(data));
+    });
+} catch (exception) {
+    console.error('failed to subscribe caption manager enable state change, because ' + JSON.stringify(exception));
+}
+```
 
 ### on('styleChange')
 
 on(type: 'styleChange', callback: Callback&lt;CaptionsStyle&gt;): void;
 
-Enables listening for captions style changes.
+Enables listening for captions style changes. This API uses an asynchronous callback to return the result.
 
-- **Parameters**
+**Parameters**
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | type | string | Yes| Type of the event to listen for, which is set to **styleChange** in this API.|
-  | callback | Callback&lt;[CaptionsStyle](#captionsstyle8)&gt; | Yes| Callback invoked when the style of captions changes.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| type | string | Yes| Type of the event to listen for, which is set to **'styleChange'** in this API.|
+| callback | Callback&lt;[CaptionsStyle](#captionsstyle8)&gt; | Yes| Callback invoked when the style of captions changes.|
 
-- **Example**
+**Example**
+
+```ts
+let captionStyle;
+let captionsManager = accessibility.getCaptionsManager();
+try {
+    captionsManager.on('styleChange', (data) => {
+        captionStyle = data;
+        console.info('subscribe caption manager style state change, result: ' + JSON.stringify(data));
+    });
+} catch (exception) {
+    console.error('failed to subscribe caption manager style state change, because ' + JSON.stringify(exception));
+}
+```
 
-  ```typescript
-  captionsManager.on('styleChange',(data) => {
-      console.info('success data:subscribeStateObserver : ' + JSON.stringify(data))
-  })
-  ```
-  
 ### off('enableChange')
 
 off(type: 'enableChange', callback?: Callback&lt;boolean&gt;): void;
 
-Disables listening for the enabled status changes of captions configuration.
+Disables listening for the enabled status changes of captions configuration. This API uses an asynchronous callback to return the result.
 
-- **Parameters**
+**Parameters**
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | type | string | Yes| Type of the event to listen for, which is set to **enableChange** in this API.|
-  | callback | Callback&lt;boolean&gt; | No| Callback invoked when the enabled status of captions configuration changes.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| type | string | Yes| Type of the event to listen for, which is set to **'enableChange'** in this API.|
+| callback | Callback&lt;boolean&gt; | No| Callback invoked when the enabled status of captions configuration changes.|
 
-- **Example**
+**Example**
 
-  ```typescript
-  captionsManager.off('enableChange')
-  ```
+```ts
+let captionsManager = accessibility.getCaptionsManager();
+try {
+    captionsManager.off('enableChange', (data) => {
+        console.info('Unsubscribe caption manager enable state change, result: ' + JSON.stringify(data));
+    });
+} catch (exception) {
+    console.error('failed to Unsubscribe caption manager enable state change, because ' + JSON.stringify(exception));
+}
+```
 
 ### off('styleChange')
 
 off(type: 'styleChange', callback?: Callback&lt;CaptionsStyle&gt;): void;
 
-Disables listening for captions style changes.
+Disables listening for captions style changes. This API uses an asynchronous callback to return the result.
 
-- **Parameters**
+**Parameters**
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | type | string | Yes| Type of the event to listen for, which is set to **styleChange** in this API.|
-  | callback | Callback&lt;[CaptionsStyle](#captionsstyle8)&gt; | No| Callback invoked when the style of captions changes.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| type | string | Yes| Type of the event to listen for, which is set to **'styleChange'** in this API.|
+| callback | Callback&lt;[CaptionsStyle](#captionsstyle8)&gt; | No| Callback invoked when the style of captions changes.|
 
-- **Example**
+**Example**
 
-  ```typescript
-  captionsManager.off('styleChange')
-  ```
+```ts
+let captionStyle;
+let captionsManager = accessibility.getCaptionsManager();
+try {
+    captionsManager.off('styleChange', (data) => {
+        captionStyle = data;
+        console.info('Unsubscribe caption manager style state change, result: ' + JSON.stringify(data));
+    });
+} catch (exception) {
+    console.error('failed to Unsubscribe caption manager style state change, because ' + JSON.stringify(exception));
+}
+```
 
 ## EventInfo
 
@@ -271,16 +297,20 @@ Implements a constructor.
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
-- **Parameters**
+**Parameters**
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | jsonObject | string | Yes| JSON string required for creating an object.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| jsonObject | string | Yes| JSON string required for creating an object.|
 
-- **Example**
+**Example**
 
-  ```typescript
-  let eventInfo = new accessibility.EventInfo({"type":"click","bundleName":"com.example.MyApplication","triggerAction":"click"})
+  ```ts
+  let eventInfo = new accessibility.EventInfo({
+    'type':'click',
+    'bundleName':'com.example.MyApplication',
+    'triggerAction':'click'
+  });
   ```
 
 ## EventType
@@ -331,153 +361,319 @@ Enumerates window update types.
 | active | Window activity change.|
 | focus | Window focus change.|
 
-## accessibility.getAbilityLists
+## accessibility.getAbilityLists<sup>(deprecated)</sup>
 
 getAbilityLists(abilityType: AbilityType, stateType: AbilityState): Promise&lt;Array&lt;AccessibilityAbilityInfo&gt;&gt;
 
 Obtains the accessibility application list. This API uses a promise to return the result.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9.
+> You are advised to use[getAccessibilityExtensionList()](#accessibilitygetaccessibilityextensionlist9).
+
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
-- **Parameters**
-
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | abilityType | [AbilityType](#abilitytype) | Yes| Accessibility application type.|
-  | stateType | [AbilityState](#abilitystate) | Yes| Accessibility application status.|
-
-- **Return value**
-
-  | Type| Description|
-  | -------- | -------- |
-  | Promise&lt;Array&lt;[AccessibilityAbilityInfo](#accessibilityabilityinfo)&gt;&gt; | Promise used to return the accessibility application list.|
-
-- **Example**
-
-  ```typescript
-  accessibility.getAbilityLists("spoken", "enable")
-      .then((data) => {
-          console.info('success data:getAbilityList1 : ' + JSON.stringify(data));
-          for (let item of data) {
-              console.info(item.id);
-              console.info(item.name);
-              console.info(item.description);
-              console.info(item.abilityTypes);
-              console.info(item.eventTypes);
-              console.info(item.capabilities);
-              console.info(item.packageName);
-              console.info(item.filterBundleNames);
-              console.info(item.bundleName);
-          }
-      }).catch((error) => {
-          console.error('failed to  getAbilityList1 because ' + JSON.stringify(error));
-      })
-  ```
+**Parameters**
 
-## accessibility.getAbilityLists
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| abilityType | [AbilityType](#abilitytype) | Yes| Accessibility application type.|
+| stateType | [AbilityState](#abilitystate) | Yes| Accessibility application status.|
+
+**Return value**
+
+| Type| Description|
+| -------- | -------- |
+| Promise&lt;Array&lt;[AccessibilityAbilityInfo](#accessibilityabilityinfo)&gt;&gt; | Promise used to return the accessibility application list.|
+
+**Example**
+
+```ts
+let abilityType = 'spoken';
+let abilityState = 'enable';
+let abilityList: accessibility.AccessibilityInfo[];
+try {
+    accessibility.getAbilityLists(abilityType, abilityState).then((data) => {
+        for (let item of data) {
+            console.info(item.id);
+            console.info(item.name);
+            console.info(item.description);
+            console.info(item.bundleName);
+            extensionList.push(item);
+        }
+        console.info('get accessibility extension list success');
+    }).catch((err) => {
+        console.error('failed to get accessibility extension list because ' + JSON.stringify(err));
+    });
+} catch (exception) {
+    console.error('failed to get accessibility extension list because ' + JSON.stringify(exception));
+}
+```
+
+## accessibility.getAbilityLists<sup>(deprecated)</sup>
 
 getAbilityLists(abilityType: AbilityType, stateType: AbilityState,callback: AsyncCallback&lt;Array&lt;AccessibilityAbilityInfo&gt;&gt;): void
 
 Obtains the accessibility application list. This API uses an asynchronous callback to return the result.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9.
+> You are advised to use [getAccessibilityExtensionList()](#accessibilitygetaccessibilityextensionlist9-1).
+
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
-- **Parameters**
-
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | abilityType | [AbilityType](#abilitytype) | Yes| Accessibility application type.|
-  | stateType | [AbilityState](#abilitystate) | Yes| Accessibility application status.|
-  | callback | AsyncCallback&lt;Array&lt;[AccessibilityAbilityInfo](#accessibilityabilityinfo)&gt;&gt; | Yes| Callback used to return the accessibility application list.|
-
-- **Example**
-
-  ```typescript
-  accessibility.getAbilityLists("visual", "enable", (err, data) => {
-      if (err) {
-          console.error('failed to getAbilityList2 because ' + JSON.stringify(err));
-          return;
-      }
-      console.info('success data:getAbilityList2 : ' + JSON.stringify(data));
-      for (let item of data) {
-          console.info(item.id);
-          console.info(item.name);
-          console.info(item.description);
-          console.info(item.abilityTypes);
-          console.info(item.eventTypes);
-          console.info(item.capabilities);
-          console.info(item.packageName);
-          console.info(item.filterBundleNames);
-          console.info(item.bundleName);
-      }
-  })
-  ```
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| abilityType | [AbilityType](#abilitytype) | Yes| Accessibility application type.|
+| stateType | [AbilityState](#abilitystate) | Yes| Accessibility application status.|
+| callback | AsyncCallback&lt;Array&lt;[AccessibilityAbilityInfo](#accessibilityabilityinfo)&gt;&gt; | Yes| Callback used to return the accessibility application list.|
+
+**Example**
+
+```ts
+let abilityType = 'spoken';
+let abilityState = 'enable';
+let abilityList: accessibility.AccessibilityInfo[];
+try {
+    accessibility.getAbilityLists(abilityType, abilityState, (err, data) => {
+        if (err) {
+            console.error('failed to get accessibility extension list because ' + JSON.stringify(err));
+            return;
+        }
+        for (let item of data) {
+            console.info(item.id);
+            console.info(item.name);
+            console.info(item.description);
+            console.info(item.bundleName);
+            abilityList.push(item);
+        }
+        console.info('get accessibility extension list success');
+    }).catch((err) => {
+        console.error('failed to get accessibility extension list because ' + JSON.stringify(err));
+    });
+} catch (exception) {
+    console.error('failed to get accessibility extension list because ' + JSON.stringify(exception));
+}
+```
+
+## accessibility.getAccessibilityExtensionList<sup>9+</sup>
+
+getAccessibilityExtensionList(abilityType: AbilityType, stateType: AbilityState): Promise&lt;Array&lt;AccessibilityAbilityInfo&gt;&gt;
+
+Obtains the accessibility application list. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| abilityType | [AbilityType](#abilitytype) | Yes| Accessibility application type.|
+| stateType | [AbilityState](#abilitystate) | Yes| Accessibility application status.|
+
+**Return value**
+
+| Type| Description|
+| -------- | -------- |
+| Promise&lt;Array&lt;[AccessibilityAbilityInfo](#accessibilityabilityinfo)&gt;&gt; | Promise used to return the accessibility application list.|
+
+**Example**
+
+```ts
+let abilityType : accessibility.AbilityType = 'spoken';
+let abilityState : accessibility.AbilityState = 'enable';
+let extensionList: accessibility.AccessibilityAbilityInfo[] = [];
+try {
+    accessibility.getAccessibilityExtensionList(abilityType, abilityState).then((data) => {
+        for (let item of data) {
+            console.info(item.id);
+            console.info(item.name);
+            console.info(item.description);
+            console.info(item.bundleName);
+            extensionList.push(item);
+        }
+        console.info('get accessibility extension list success');
+    }).catch((err) => {
+        console.error('failed to get accessibility extension list because ' + JSON.stringify(err));
+    });
+} catch (exception) {
+    console.error('failed to get accessibility extension list because ' + JSON.stringify(exception));
+}
+```
+
+## accessibility.getAccessibilityExtensionList<sup>9+</sup>
+
+getAccessibilityExtensionList(abilityType: AbilityType, stateType: AbilityState, callback: AsyncCallback&lt;Array&lt;AccessibilityAbilityInfo&gt;&gt;): void
+
+Obtains the accessibility application list. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| abilityType | [AbilityType](#abilitytype) | Yes| Accessibility application type.|
+| stateType | [AbilityState](#abilitystate) | Yes| Accessibility application status.|
+| callback | AsyncCallback&lt;Array&lt;[AccessibilityAbilityInfo](#accessibilityabilityinfo)&gt;&gt; | Yes| Callback used to return the accessibility application list.|
+
+**Example**
+
+```ts
+let abilityType : accessibility.AbilityType = 'spoken';
+let abilityState : accessibility.AbilityState = 'enable';
+let extensionList: accessibility.AccessibilityAbilityInfo[] = [];
+try {
+    accessibility.getAccessibilityExtensionList(abilityType, abilityState, (err, data) => {
+        if (err) {
+            console.error('failed to get accessibility extension list because ' + JSON.stringify(err));
+            return;
+        }
+        for (let item of data) {
+            console.info(item.id);
+            console.info(item.name);
+            console.info(item.description);
+            console.info(item.bundleName);
+            extensionList.push(item);
+        }
+        console.info('get accessibility extension list success');
+    });
+} catch (exception) {
+    console.error('failed to get accessibility extension list because ' + JSON.stringify(exception));
+}
+```
 
 ## accessibility.getCaptionsManager<sup>8+</sup>
 
 getCaptionsManager(): CaptionsManager
 
-Obtains the captions configuration.
+Obtains a **CaptionsManager** instance.
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Hearing
 
-- **Return value**
+**Return value**
 
-  | Type| Description|
-  | -------- | -------- |
-  | [CaptionsManager](#captionsmanager8) | Captions configuration.|
+| Type| Description|
+| -------- | -------- |
+| [CaptionsManager](#captionsmanager8) | Captions configuration.|
 
-- **Example**
+**Example**
 
-  ```typescript
-  captionsManager = accessibility.getCaptionsManager()
-  ```
+```ts
+let captionsManager = accessibility.getCaptionsManager();
+```
 
-## accessibility.on('accessibilityStateChange' | 'touchGuideStateChange')
+## accessibility.on('accessibilityStateChange')
 
-on(type: 'accessibilityStateChange' | 'touchGuideStateChange', callback: Callback&lt;boolean&gt;): void
+on(type: 'accessibilityStateChange', callback: Callback&lt;boolean&gt;): void
 
-Enables listening for the enabled status changes of the accessibility application or touch guide mode.
+Enables listening for the enabled status changes of the accessibility application. This API uses an asynchronous callback to return the result.
 
  
 
-- **Parameters**
+**Parameters**
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | type | string | Yes| Type of the event to listen for.<br>- **'accessibilityStateChange'** means to listen for the enabled status changes of the accessibility application.<br>**System capability**: SystemCapability.BarrierFree.Accessibility.Core<br>- **'touchGuideStateChange'** means to listen for the enabled status changes of the touch guide mode.<br>**System capability**: SystemCapability.BarrierFree.Accessibility.Vision|
-  | callback | Callback\<boolean> | Yes| Callback invoked when the enabled status of captions configuration changes.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| type | string | Yes| Type of the event to listen for, which is set to **'accessibilityStateChange'** in this API.|
+| callback | Callback&lt;boolean&gt; | Yes| Callback used to return the result.|
 
-- **Example**
+**Example**
 
-  ```typescript
-  accessibility.on('accessibilityStateChange',(data) => { 
-      console.info('success data:subscribeStateObserver : ' + JSON.stringify(data))
-  })
-  ```
+```ts
+try {
+    accessibility.on('accessibilityStateChange', (data) => {
+        console.info('subscribe accessibility state change, result: ' + JSON.stringify(data));
+    });
+} catch (exception) {
+    console.error('failed to subscribe accessibility state change, because ' + JSON.stringify(exception));
+}
+```
 
-## accessibility.off('accessibilityStateChange' | 'touchGuideStateChange')
+## accessibility.on('touchGuideStateChange')
 
-off(type: 'accessibilityStateChange ' | 'touchGuideStateChange', callback?: Callback&lt;boolean&gt;): void
+on(type: 'touchGuideStateChange', callback: Callback&lt;boolean&gt;): void
 
-Disables listening for the enabled status changes of the accessibility application or touch guide mode.
+Enables listening for the enabled status changes of the touch guide mode. This API uses an asynchronous callback to return the result.
 
  
 
-- **Parameters**
+**Parameters**
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | type |  string | No| Type of the event to listen for.<br>- **'accessibilityStateChange'** means to listen for the enabled status changes of the accessibility application.<br>**System capability**: SystemCapability.BarrierFree.Accessibility.Core<br>- **'touchGuideStateChange'** means to listen for the enabled status changes of the touch guide mode.<br>**System capability**: SystemCapability.BarrierFree.Accessibility.Vision|
-  | callback | Callback&lt;boolean&gt; | No| Callback invoked when the enabled status changes.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| type | string | Yes| Type of the event to listen for, which is set to **'touchGuideStateChange'** in this API.|
+| callback | Callback&lt;boolean&gt; | Yes| Callback used to return the result.|
 
-- **Example**
+**Example**
 
-  ```typescript
-  accessibility.off('accessibilityStateChange',(data) => {
-      console.info('success data:unSubscribeStateObserver : ' + JSON.stringify(data))
-  })
-  ```
+```ts
+try {
+    accessibility.on('touchGuideStateChange', (data) => {
+        console.info('subscribe touch guide state change, result: ' + JSON.stringify(data));
+    });
+} catch (exception) {
+    console.error('failed to subscribe touch guide state change, because ' + JSON.stringify(exception));
+}
+```
+
+## accessibility.off('accessibilityStateChange')
+
+off(type: 'accessibilityStateChange', callback?: Callback&lt;boolean&gt;): void
+
+Disables listening for the enabled status changes of the accessibility application. This API uses an asynchronous callback to return the result.
+
+ 
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| type |  string | No| Type of the event to listen for, which is set to **'accessibilityStateChange'** in this API.|
+| callback | Callback&lt;boolean&gt; | No| Callback used to return the result.|
+
+**Example**
+
+```ts
+try {
+    accessibility.off('accessibilityStateChange', (data) => {
+        console.info('Unsubscribe accessibility state change, result: ' + JSON.stringify(data));
+    });
+} catch (exception) {
+    console.error('failed to Unsubscribe accessibility state change, because ' + JSON.stringify(exception));
+}
+```
+
+## accessibility.off('touchGuideStateChange')
+
+off(type: 'touchGuideStateChange', callback?: Callback&lt;boolean&gt;): void
+
+Disables listening for the enabled status changes of the touch guide mode. This API uses an asynchronous callback to return the result.
+
+ 
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| type |  string | No| Type of the event to listen for, which is set to **'touchGuideStateChange'** in this API.|
+| callback | Callback&lt;boolean&gt; | No| Callback used to return the result.|
+
+**Example**
+
+```ts
+try {
+    accessibility.off('touchGuideStateChange', (data) => {
+        console.info('Unsubscribe touch guide state change, result: ' + JSON.stringify(data));
+    });
+} catch (exception) {
+    console.error('failed to Unsubscribe touch guide state change, because ' + JSON.stringify(exception));
+}
+```
 
 ## accessibility.isOpenAccessibility
 
@@ -487,22 +683,21 @@ Checks whether accessibility is enabled. This API uses a promise to return the r
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
-- **Return value**
+**Return value**
 
-  | Type| Description|
-  | -------- | -------- |
-  | Promise&lt;boolean&gt; | Returns **true** if accessibility is enabled; returns **false** otherwise.|
+| Type| Description|
+| -------- | -------- |
+| Promise&lt;boolean&gt; | Promise used to return the result. Returns **true** if accessibility is enabled; returns **false** otherwise.|
 
-- **Example**
+**Example**
 
-  ```typescript
-  accessibility.isOpenAccessibility()
-      .then((data) => {
-          console.info('success data:isOpenAccessibility : ' + JSON.stringify(data))
-      }).catch((error) => {
-          console.error('failed to  isOpenAccessibility because ' + JSON.stringify(error));
-      })
-  ```
+```ts
+accessibility.isOpenAccessibility().then((data) => {
+    console.info('success data:isOpenAccessibility : ' + JSON.stringify(data))
+}).catch((err) => {
+    console.error('failed to  isOpenAccessibility because ' + JSON.stringify(err));
+});
+```
 
 ## accessibility.isOpenAccessibility
 
@@ -512,23 +707,23 @@ Checks whether accessibility is enabled. This API uses an asynchronous callback
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
-- **Parameters**
+**Parameters**
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | callback | AsyncCallback&lt;boolean&gt; | Yes| Callback used to return the result. Returns **true** if accessibility is enabled; returns **false** otherwise.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| callback | AsyncCallback&lt;boolean&gt; | Yes| Callback used to return the result. Returns **true** if accessibility is enabled; returns **false** otherwise.|
 
-- **Example**
+**Example**
 
-  ```typescript
-  accessibility.isOpenAccessibility((err, data) => {
-      if (err) {
-          console.error('failed to isOpenAccessibility because ' + JSON.stringify(err));
-          return;
-      }
-      console.info('success data:isOpenAccessibility : ' + JSON.stringify(data))
-  })
-  ```
+```ts
+accessibility.isOpenAccessibility((err, data) => {
+    if (err) {
+        console.error('failed to isOpenAccessibility because ' + JSON.stringify(err));
+        return;
+    }
+    console.info('success data:isOpenAccessibility : ' + JSON.stringify(data))
+});
+```
 
 ## accessibility.isOpenTouchGuide
 
@@ -538,22 +733,21 @@ Checks whether touch guide mode is enabled. This API uses a promise to return th
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Vision
 
-- **Return value**
+**Return value**
 
-  | Type| Description|
-  | -------- | -------- |
-  | Promise&lt;boolean&gt; | Returns **true** if touch guide mode is enabled; returns **false** otherwise.|
+| Type| Description|
+| -------- | -------- |
+| Promise&lt;boolean&gt; | Promise used to return the result. Returns **true** if touch guide mode is enabled; returns **false** otherwise.|
 
-- **Example**
+**Example**
 
-  ```typescript
-  accessibility.isOpenTouchGuide()
-      .then((data) => {
-          console.info('success data:isOpenTouchGuide : ' + JSON.stringify(data))
-      }).catch((error) => {
-          console.error('failed to  isOpenTouchGuide because ' + JSON.stringify(error));
-      })
-  ```
+```ts
+accessibility.isOpenTouchGuide().then((data) => {
+    console.info('success data:isOpenTouchGuide : ' + JSON.stringify(data))
+}).catch((err) => {
+    console.error('failed to  isOpenTouchGuide because ' + JSON.stringify(err));
+});
+```
 
 ## accessibility.isOpenTouchGuide
 
@@ -563,78 +757,172 @@ Checks whether touch guide mode is enabled. This API uses an asynchronous callba
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Vision
 
-- **Parameters**
+**Parameters**
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | callback | AsyncCallback&lt;boolean&gt; | Yes| Callback used to return the result. Returns **true** if touch guide mode is enabled; returns **false** otherwise.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| callback | AsyncCallback&lt;boolean&gt; | Yes| Callback used to return the result. Returns **true** if touch guide mode is enabled; returns **false** otherwise.|
 
-- **Example**
+**Example**
 
-  ```typescript
-  accessibility.isOpenTouchGuide((err, data) => {
-      if (err) {
-          console.error('failed to isOpenTouchGuide because ' + JSON.stringify(err));
-          return;
-      }
-      console.info('success data:isOpenTouchGuide : ' + JSON.stringify(data))
-  })
-  ```
+```ts
+accessibility.isOpenTouchGuide((err, data) => {
+    if (err) {
+        console.error('failed to isOpenTouchGuide because ' + JSON.stringify(err));
+        return;
+    }
+    console.info('success data:isOpenTouchGuide : ' + JSON.stringify(data))
+});
+```
 
-## accessibility.sendEvent
+## accessibility.sendEvent<sup>(deprecated)</sup>
 
 sendEvent(event: EventInfo): Promise&lt;void&gt;
 
 Sends an accessibility event. This API uses a promise to return the result.
 
-**System capability**: SystemCapability.BarrierFree.Accessibility.Core
-
-- **Parameters**
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9.
+> You are advised to use **[sendAccessibilityEvent()](#accessibilitysendaccessibilityevent9)**.
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | event | [EventInfo](#eventinfo) | Yes| Accessibility event.|
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
-- **Return value**
+**Parameters**
 
-  | Type| Description|
-  | -------- | -------- |
-  | Promise&lt;void&gt; | Promise used to return the result. Returns data if the accessibility event is sent successfully; returns an error otherwise.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| event | [EventInfo](#eventinfo) | Yes| Accessibility event.|
 
-- **Example**
+**Return value**
 
-  ```typescript
-  accessibility.sendEvent(this.eventInfo)
-      .then((data) => {
-          console.info('success data:sendEvent : ' + JSON.stringify(data))
-      }).catch((error) => {
-          console.error('failed to  sendEvent because ' + JSON.stringify(error));
-      })
-  ```
+| Type| Description|
+| -------- | -------- |
+| Promise&lt;void&gt; | Promise that returns no value.|
+
+**Example**
+
+```ts
+let eventInfo = new accessibility.EventInfo({
+  'type':'click',
+  'bundleName':'com.example.MyApplication',
+  'triggerAction':'click'
+});
+accessibility.sendEvent(eventInfo).then(() => {
+    console.info('send event success');
+}).catch((err) => {
+    console.error('failed to sendEvent because ' + JSON.stringify(err));
+});
+```
 
-## accessibility.sendEvent
+## accessibility.sendEvent<sup>(deprecated)</sup>
 
 sendEvent(event: EventInfo, callback: AsyncCallback&lt;void&gt;): void
 
 Sends an accessibility event. This API uses an asynchronous callback to return the result.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9.
+> You are advised to use **[sendAccessibilityEvent()](#accessibilitysendaccessibilityevent9-1)**.
+
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
-- **Parameters**
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| event | [EventInfo](#eventinfo) | Yes| Accessibility event.|
+| callback | AsyncCallback&lt;void&gt; | Yes| Callback used to return the result. If the operation fails, **error** that contains data is returned. |
+
+**Example**
+
+```ts
+let eventInfo = new accessibility.EventInfo({
+  'type':'click',
+  'bundleName':'com.example.MyApplication',
+  'triggerAction':'click'
+});
+accessibility.sendEvent(eventInfo, (err, data) => {
+    if (err) {
+        console.error('failed to sendEvent because ' + JSON.stringify(err));
+        return;
+    }
+    console.info('sendEvent success');
+});
+```
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | event | [EventInfo](#eventinfo) | Yes| Accessibility event.|
-  | callback | AsyncCallback&lt;void&gt; | Yes| Callback used to return the result. Returns data if the accessibility event is sent successfully; returns an error otherwise.|
+## accessibility.sendAccessibilityEvent<sup>9+</sup>
 
-- **Example**
+sendAccessibilityEvent(event: EventInfo): Promise&lt;void&gt;
 
-  ```typescript
-  accessibility.sendEvent(this.eventInfo,(err, data) => {
-      if (err) {
-          console.error('failed to sendEvent because ' + JSON.stringify(err));
-          return;
-      }   
-      console.info('success data:sendEvent : ' + JSON.stringify(data))
-  })
-  ```
+Sends an accessibility event. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| event | [EventInfo](#eventinfo) | Yes| Accessibility event.|
+
+**Return value**
+
+| Type| Description|
+| -------- | -------- |
+| Promise&lt;void&gt; | Promise that returns no value.|
+
+**Example**
+
+```ts
+let eventInfo = new accessibility.EventInfo({
+    'type':'click',
+    'bundleName':'com.example.MyApplication',
+    'triggerAction':'click'
+});
+try {
+    accessibility.sendAccessibilityEvent(eventInfo).then(() => {
+        console.info('send event success');
+    }).catch((err) => {
+        console.error('failed to send event because ' + JSON.stringify(err));
+    });
+} catch (exception) {
+    console.error('failed to send event because ' + JSON.stringify(exception));
+}
+```
+
+## accessibility.sendAccessibilityEvent<sup>9+</sup>
+
+sendAccessibilityEvent(event: EventInfo, callback: AsyncCallback&lt;void&gt;): void
+
+Sends an accessibility event. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| event | [EventInfo](#eventinfo) | Yes| Accessibility event.|
+| callback | AsyncCallback&lt;void&gt; | Yes| Callback used to return the result. If the operation fails, **error** that contains data is returned. |
+
+**Example**
+
+```ts
+let eventInfo = new accessibility.EventInfo({
+    'type':'click',
+    'bundleName':'com.example.MyApplication',
+    'triggerAction':'click'
+});
+try {
+    accessibility.sendEvent(eventInfo, (err, data) => {
+        if (err) {
+            console.error('failed to send event because ' + JSON.stringify(err));
+            return;
+        }
+        console.info('send event success');
+    });
+} catch (exception) {
+    console.error('failed to send event because ' + JSON.stringify(exception));
+}
+```

en/application-dev/reference/apis/js-apis-application-accessibilityExtensionAbility.md

-# Accessibility Extension Ability
+# @ohos.application.AccessibilityExtensionAbility
 
-The **AccessibilityExtensionAbility** module is based on the ExtensionAbility framework and provides the **AccessibilityExtensionAbility**.
+The **AccessibilityExtensionAbility** module provides accessibility extension capabilities based on the ExtensionAbility framework.
 
->**NOTE**
+> **NOTE**
 >
->The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
->
->The APIs of this module can be used only in the stage model.
+> The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
 
 ## Modules to Import
 
@@ -18,9 +16,9 @@ import AccessibilityExtensionAbility from '@ohos.application.AccessibilityExtens
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
-| Name  | Type | Readable | Writable | Description           |
+| Name     | Type| Readable| Writable| Description                     |
 | --------- | -------- | ---- | ---- | ------------------------- |
-| context | [AccessibilityExtensionContext](js-apis-accessibility-extension-context.md) | Yes | No | Context of the accessibility extension ability. |
+| context | [AccessibilityExtensionContext](js-apis-inner-application-accessibilityExtensionContext.md) | Yes| No| Context of the accessibility extension ability.|
 
 ## AccessibilityEvent
 
@@ -32,36 +30,10 @@ Defines an accessibility event.
 
 | Name       | Type                                    | Readable  | Writable  | Description        |
 | --------- | ---------------------------------------- | ---- | ---- | ---------- |
-| eventType | [EventType](js-apis-accessibility.md#eventtype) \| [WindowUpdateType](js-apis-accessibility.md#windowupdatetype) \| [TouchGuideType](#touchguidetype) \| [GestureType](#gesturetype) \| [PageUpdateType](#pageupdatetype) | Yes   | No   | Event type.   |
+| eventType | [accessibility.EventType](js-apis-accessibility.md#EventType) \| [accessibility.WindowUpdateType](js-apis-accessibility.md#WindowUpdateType) \| [TouchGuideType](#touchguidetype) \| [GestureType](#gesturetype) \| [PageUpdateType](#pageupdatetype) | Yes   | No   | Event type.   |
 | target    | AccessibilityElement                     | Yes   | No   | Target component where the event occurs.|
 | timeStamp | number                                   | Yes   | No   | Timestamp of the event.    |
 
-## GesturePath
-
-Defines a gesture path.
-
-**System capability**: SystemCapability.BarrierFree.Accessibility.Core
-
-### Attributes
-
-| Name          | Type                                    | Readable  | Writable  | Description    |
-| ------------ | ---------------------------------------- | ---- | ---- | ------ |
-| points       | Array<[GesturePoint](gesturepoint)> | Yes   | Yes   | An array of gesture touch points. |
-| durationTime | number                                   | Yes   | Yes   | Total time consumed by the gesture.|
-
-## GesturePoint
-
-Defines a gesture touch point.
-
-**System capability**: SystemCapability.BarrierFree.Accessibility.Core
-
-### Attributes
-
-| Name       | Type  | Readable  | Writable  | Description     |
-| --------- | ------ | ---- | ---- | ------- |
-| positionX | number | Yes   | Yes   | X-coordinate of the touch point.|
-| positionY | number | Yes   | Yes   | Y-coordinate of the touch point.|
-
 ## GestureType
 
 Enumerates gesture types.
@@ -89,7 +61,7 @@ Enumerates gesture types.
 
 ## PageUpdateType
 
-Enumerates the page refresh types.
+Enumerates the page update types.
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
@@ -106,27 +78,25 @@ Enumerates the touch guide event types.
 
 | Name        | Description          |
 | ---------- | ------------ |
-| touchBegin | A touch starts in touch guide mode.|
-| touchEnd   | A touch ends in touch guide mode.|
+| touchBegin | Start of touch in touch guide mode. |
+| touchEnd   | End of touch in touch guide mode. |
 
 ## AccessibilityExtensionAbility.onConnect
 
 onConnect(): void;
 
-Called when the **AccessibilityExtensionAbility** is enabled and connected to the system service. In this API, you can initialize service logic. This API can be overridden as required.
+Called when the **AccessibilityExtensionAbility** is enabled and connected to the system service. In this API, you can have the service logic initialized. This API can be overridden as required.
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
-**Parameters**
-
-None
-
 **Example**
 
 ```ts
-onConnect(): void {
-    console.log("AxExtensionAbility onConnect");
-}
+class MyAccessibilityExtensionAbility extends AccessibilityExtensionAbility {
+    onConnect() {
+        console.log('AxExtensionAbility onConnect');
+    }
+};
 ```
 
 ## AccessibilityExtensionAbility.onDisconnect
@@ -137,16 +107,14 @@ Called when the **AccessibilityExtensionAbility** is disabled and disconnected f
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
-**Parameters**
-
-None
-
 **Example**
 
 ```ts
-onDisconnect(): void {
-    console.log("AxExtensionAbility onDisconnect");
-}
+class MyAccessibilityExtensionAbility extends AccessibilityExtensionAbility {
+    onDisconnect() {
+        console.log('AxExtensionAbility onDisconnect');
+    }
+};
 ```
 
 ## AccessibilityExtensionAbility.onAccessibilityEvent
@@ -166,19 +134,21 @@ Called when an event that matches the specified bundle and event type occurs. In
 **Example**
 
 ```ts
-onAccessibilityEvent(event: AccessibilityEvent): void {
-    console.log("AxExtensionAbility onAccessibilityEvent");
-    if (event.eventType == 'click') {
-        console.log("AxExtensionAbility onAccessibilityEvent: click");
+class MyAccessibilityExtensionAbility extends AccessibilityExtensionAbility {
+    onAccessibilityEvent(event) {
+        console.log('AxExtensionAbility onAccessibilityEvent');
+        if (event.eventType == 'click') {
+            console.log('AxExtensionAbility onAccessibilityEvent: click');
+        }
     }
-}
+};
 ```
 
 ## AccessibilityExtensionAbility.onKeyEvent
 
-onKeyEvent(keyEvent: inputEventClient.KeyEvent): boolean;
+onKeyEvent(keyEvent: KeyEvent): boolean;
 
-Called when a physical key is pressed. In this API, you can determine whether to intercept the key event based on the service.
+Called when a physical key is pressed. In this API, you can determine whether to intercept an event based on the service.
 
 **System capability**: SystemCapability.BarrierFree.Accessibility.Core
 
@@ -191,12 +161,14 @@ Called when a physical key is pressed. In this API, you can determine whether to
 **Example**
 
 ```ts
-onKeyEvent(keyEvent: inputEventClient.KeyEvent): boolean {
-    console.log("AxExtensionAbility onKeyEvent");
-    if (keyEvent.keyCode == 22) {
-        console.log("AxExtensionAbility onKeyEvent: intercept 22");
-        return true;
+class MyAccessibilityExtensionAbility extends AccessibilityExtensionAbility {
+    onKeyEvent(keyEvent) {
+        console.log('AxExtensionAbility onKeyEvent');
+        if (keyEvent.keyCode == 22) {
+            console.log('AxExtensionAbility onKeyEvent: intercept 22');
+            return true;
+        }
+        return false;
     }
-    return false;
-}
+};
 ```

en/application-dev/reference/apis/js-apis-inner-application-accessibilityExtensionContext.md

+# AccessibilityExtensionContext
+
+The **AccessibilityExtensionContext** module, inherited from **ExtensionContext**, provides context for **Accessibility Extension** abilities.
+
+You can use the APIs of this module to configure the concerned information, obtain root information, and inject gestures.
+
+> **NOTE**
+>
+> The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+>
+> The APIs of this module can be used only in the stage model.
+
+## Usage
+
+Before using the **AccessibilityExtensionContext** module, you must define a child class that inherits from **AccessibilityExtensionAbility**.
+
+```ts
+import AccessibilityExtensionAbility from '@ohos.application.AccessibilityExtensionAbility'
+let axContext;
+class MainAbility extends AccessibilityExtensionAbility {
+    onConnect(): void {
+        console.log('AxExtensionAbility onConnect');
+        axContext = this.context;
+    }
+}
+```
+
+## FocusDirection
+
+Enumerates the focus directions.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+| Name      | Description     |
+| -------- | ------- |
+| up       | Search for the next focusable item above the current item in focus.|
+| down     | Search for the next focusable item below the current item in focus.|
+| left     | Search for the next focusable item on the left of the current item in focus.|
+| right    | Search for the next focusable item on the right of the current item in focus.|
+| forward  | Search for the next focusable item before the current item in focus.|
+| backward | Search for the next focusable item after the current item in focus.|
+
+## FocusType
+
+Enumerates the focus types.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+| Name           | Description         |
+| ------------- | ----------- |
+| accessibility | Accessibility focus.|
+| normal        | Normal focus. |
+
+## Rect
+
+Defines a rectangle.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+| Name    | Type  | Readable  | Writable  | Description       |
+| ------ | ------ | ---- | ---- | --------- |
+| left   | number | Yes   | No   | Left boundary of the rectangle.|
+| top    | number | Yes   | No   | Top boundary of the rectangle.|
+| width  | number | Yes   | No   | Width of the rectangle. |
+| height | number | Yes   | No   | Height of the rectangle. |
+
+## WindowType
+
+Enumerates the window types.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+| Name         | Description       |
+| ----------- | --------- |
+| application | Application window.|
+| system      | System window.|
+
+## AccessibilityExtensionContext.setTargetBundleName
+
+setTargetBundleName(targetNames: Array\<string>): Promise\<void>;
+
+Sets the concerned target bundle. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type               | Mandatory  | Description      |
+| ----------- | ------------------- | ---- | -------- |
+| targetNames | Array&lt;string&gt; | Yes   | Name of the target bundle.|
+
+**Return value**
+
+| Type                    | Description                   |
+| ---------------------- | --------------------- |
+| Promise&lt;void&gt; | Promise that returns no value.|
+
+**Example**
+
+```ts
+let targetNames = ['com.ohos.xyz'];
+try {
+    axContext.setTargetBundleName(targetNames).then(() => {
+        console.info('set target bundle names success');
+    }).catch((err) => {
+        console.error('failed to set target bundle names, because ' + JSON.stringify(err));
+    });
+} catch (exception) {
+    console.error('failed to set target bundle names, because ' + JSON.stringify(exception));
+};
+```
+
+## AccessibilityExtensionContext.setTargetBundleName
+
+setTargetBundleName(targetNames: Array\<string>, callback: AsyncCallback\<void>): void;
+
+Sets the concerned target bundle. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type               | Mandatory  | Description      |
+| ----------- | ------------------- | ---- | -------- |
+| targetNames | Array&lt;string&gt; | Yes   | Name of the target bundle.|
+| callback    | AsyncCallback&lt;void&gt; | Yes   | Callback used to return the result. If the operation fails, **error** that contains data is returned.|
+
+**Example**
+
+```ts
+let targetNames = ['com.ohos.xyz'];
+try {
+    axContext.setTargetBundleName(targetNames, (err, data) => {
+        if (err) {
+            console.error('failed to set target bundle names, because ' + JSON.stringify(err));
+            return;
+        }
+        console.info('set target bundle names success');
+    });
+} catch (exception) {
+    console.error('failed to set target bundle names, because ' + JSON.stringify(exception));
+};
+```
+
+## AccessibilityExtensionContext.getFocusElement
+
+getFocusElement(isAccessibilityFocus?: boolean): Promise\<AccessibilityElement>;
+
+Obtains the focus element. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name                 | Type   | Mandatory  | Description                 |
+| -------------------- | ------- | ---- | ------------------- |
+| isAccessibilityFocus | boolean | No   | Whether the obtained focus element is an accessibility focus. The default value is **false**.|
+
+**Return value**
+
+| Type                                 | Description                    |
+| ----------------------------------- | ---------------------- |
+| Promise&lt;AccessibilityElement&gt; | Promise used to return the current focus element.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300003 | Do not have accessibility right for this operation. |
+
+**Example**
+
+```ts
+let focusElement;
+try {
+    axContext.getFocusElement().then((data) => {
+        focusElement = data;
+        console.log('get focus element success');
+    }).catch((err) => {
+        console.error('failed to get focus element, because ' + JSON.stringify(err));
+    });
+} catch (exception) {
+    console.error('failed to get focus element, because ' + JSON.stringify(exception));
+}
+```
+
+## AccessibilityExtensionContext.getFocusElement
+
+getFocusElement(callback: AsyncCallback\<AccessibilityElement>): void;
+
+Obtains the focus element. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| callback    | AsyncCallback&lt;AccessibilityElement&gt; | Yes   | Callback used to return the current focus element.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300003 | Do not have accessibility right for this operation. |
+
+**Example**
+
+```ts
+let focusElement;
+try {
+    axContext.getFocusElement((err, data) => {
+        if (err) {
+            console.error('failed to get focus element, because ' + JSON.stringify(err));
+            return;
+        }
+        focusElement = data;
+        console.info('get focus element success');
+    });
+} catch (exception) {
+    console.error('failed to get focus element, because ' + JSON.stringify(exception));
+}
+```
+
+## AccessibilityExtensionContext.getFocusElement
+
+getFocusElement(isAccessibilityFocus: boolean, callback: AsyncCallback\<AccessibilityElement>): void;
+
+Obtains the focus element. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name                 | Type   | Mandatory  | Description                 |
+| -------------------- | ------- | ---- | ------------------- |
+| isAccessibilityFocus | boolean | Yes   | Whether the obtained focus element is an accessibility focus.|
+| callback    | AsyncCallback&lt;AccessibilityElement&gt; | Yes   | Callback used to return the current focus element.|
+
+**Example**
+
+```ts
+let focusElement;
+let isAccessibilityFocus = true;
+try {
+    axContext.getFocusElement(isAccessibilityFocus, (err, data) => {
+    if (err) {
+        console.error('failed to get focus element, because ' + JSON.stringify(err));
+        return;
+    }
+    focusElement = data;
+    console.info('get focus element success');
+});
+} catch (exception) {
+    console.error('failed to get focus element, because ' + JSON.stringify(exception));
+}
+```
+## AccessibilityExtensionContext.getWindowRootElement
+
+getWindowRootElement(windowId?: number): Promise\<AccessibilityElement>;
+
+Obtains the root element of a window. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name                 | Type   | Mandatory  | Description                 |
+| -------------------- | ------- | ---- | ------------------- |
+| windowId | number | No   | Window for which you want to obtain the root element. If this parameter is not specified, it indicates the current active window.|
+
+**Return value**
+
+| Type                                 | Description                    |
+| ----------------------------------- | ---------------------- |
+| Promise&lt;AccessibilityElement&gt; | Promise used to return the root element.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300003 | Do not have accessibility right for this operation. |
+
+**Example**
+
+```ts
+let rootElement;
+try {
+    axContext.getWindowRootElement().then((data) => {
+        rootElement = data;
+        console.log('get root element of the window success');
+    }).catch((err) => {
+        console.error('failed to get root element of the window, because ' + JSON.stringify(err));
+    });
+} catch (exception) {
+    console.error('failed to get root element of the window, ' + JSON.stringify(exception));
+}
+```
+
+## AccessibilityExtensionContext.getWindowRootElement
+
+getWindowRootElement(callback: AsyncCallback\<AccessibilityElement>): void;
+
+Obtains the root element of a window. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| callback    | AsyncCallback&lt;AccessibilityElement&gt; | Yes   | Callback used to return the root element.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300003 | Do not have accessibility right for this operation. |
+
+**Example**
+
+```ts
+let rootElement;
+try {
+    axContext.getWindowRootElement((err, data) => {
+    if (err) {
+        console.error('failed to get root element of the window, because ' + JSON.stringify(err));
+        return;
+    }
+    rootElement = data;
+    console.info('get root element of the window success');
+});
+} catch (exception) {
+    console.error('failed to get root element of the window, because ' + JSON.stringify(exception));
+}
+```
+
+## AccessibilityExtensionContext.getWindowRootElement
+
+getWindowRootElement(windowId: number, callback: AsyncCallback\<AccessibilityElement>): void;
+
+Obtains the root element of a window. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name                 | Type   | Mandatory  | Description                 |
+| -------------------- | ------- | ---- | ------------------- |
+| windowId | number | Yes   | Window for which you want to obtain the root element. If this parameter is not specified, it indicates the current active window.|
+| callback    | AsyncCallback&lt;AccessibilityElement&gt; | Yes   | Callback used to return the root element.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300003 | Do not have accessibility right for this operation. |
+
+**Example**
+
+```ts
+let rootElement;
+let windowId = 10;
+try {
+    axContext.getWindowRootElement(windowId, (err, data) => {
+    if (err) {
+        console.error('failed to get root element of the window, because ' + JSON.stringify(err));
+        return;
+    }
+    rootElement = data;
+    console.info('get root element of the window success');
+});
+} catch (exception) {
+    console.error('failed to get root element of the window, because ' + JSON.stringify(exception));
+}
+```
+
+## AccessibilityExtensionContext.getWindows
+
+getWindows(displayId?: number): Promise\<Array\<AccessibilityElement>>;
+
+Obtains the list of windows on a display. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name                 | Type   | Mandatory  | Description                 |
+| -------------------- | ------- | ---- | ------------------- |
+| displayId | number | No   | ID of the display from which the window information is obtained. If this parameter is not specified, it indicates the default main display.|
+
+**Return value**
+
+| Type                                 | Description                    |
+| ----------------------------------- | ---------------------- |
+| Promise&lt;Array&lt;AccessibilityElement&gt;&gt; | Promise used to return the window list.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300003 | Do not have accessibility right for this operation. |
+
+**Example**
+
+```ts
+let windows;
+try {
+    axContext.getWindows().then((data) => {
+        windows = data;
+        console.log('get windows success');
+    }).catch((err) => {
+        console.error('failed to get windows, because ' + JSON.stringify(err));
+    });
+} catch (exception) {
+    console.error('failed to get windows, because ' + JSON.stringify(exception));
+}
+```
+
+## AccessibilityExtensionContext.getWindows
+
+getWindows(callback: AsyncCallback\<Array\<AccessibilityElement>>): void;
+
+Obtains the list of windows on a display. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| callback    | AsyncCallback&lt;Array&lt;AccessibilityElement&gt;&gt; | Yes   | Callback used to return the window list.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300003 | Do not have accessibility right for this operation. |
+
+**Example**
+
+```ts
+let windows;
+try {
+    axContext.getWindows((err, data) => {
+        if (err) {
+            console.error('failed to get windows, because ' + JSON.stringify(err));
+            return;
+        }
+        windows = data;
+        console.info('get windows success');
+    });
+} catch (exception) {
+    console.error('failed to get windows, because ' + JSON.stringify(exception));
+}
+```
+
+## AccessibilityExtensionContext.getWindows
+
+getWindows(displayId: number, callback: AsyncCallback\<Array\<AccessibilityElement>>): void;
+
+Obtains the list of windows on a display. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name                 | Type   | Mandatory  | Description                 |
+| -------------------- | ------- | ---- | ------------------- |
+| displayId | number | Yes   | ID of the display from which the window information is obtained. If this parameter is not specified, it indicates the default main display.|
+| callback    | AsyncCallback&lt;Array&lt;AccessibilityElement&gt;&gt; | Yes   | Callback used to return the window list.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300003 | Do not have accessibility right for this operation. |
+
+**Example**
+
+```ts
+let windows;
+let displayId = 10;
+try {
+    axContext.getWindows(displayId, (err, data) => {
+        if (err) {
+            console.error('failed to get windows, because ' + JSON.stringify(err));
+            return;
+        }
+        windows = data;
+        console.info('get windows success');
+    });
+} catch (exception) {
+    console.error('failed to get windows, because ' + JSON.stringify(exception));
+}
+```
+
+## AccessibilityExtensionContext.injectGesture
+
+injectGesture(gesturePath: GesturePath): Promise\<void>;
+
+Inject a gesture. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type                                    | Mandatory  | Description            |
+| ----------- | ---------------------------------------- | ---- | -------------- |
+| gesturePath | [GesturePath](js-apis-accessibility-GesturePath.md#gesturepath) | Yes   | Path of the gesture to inject.    |
+
+**Return value**
+
+| Type                                 | Description                    |
+| ----------------------------------- | ---------------------- |
+| Promise&lt;void&gt; | Promise that returns no value.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300003 | Do not have accessibility right for this operation. |
+
+**Example**
+
+```ts
+import GesturePath from "@ohos.accessibility.GesturePath";
+import GesturePoint from '@ohos.accessibility.GesturePoint';
+let gesturePath = new GesturePath.GesturePath(100);
+try {
+    for (let i = 0; i < 10; i++) {
+        let gesturePoint = new GesturePoint.GesturePoint(100, i * 200);
+        gesturePath.points.push(gesturePoint);
+    }
+    axContext.injectGesture(gesturePath).then(() => {
+        console.info('inject gesture success');
+    }).catch((err) => {
+        console.error('failed to inject gesture, because ' + JSON.stringify(err));
+    });
+} catch (exception) {
+    console.error('failed to inject gesture, because ' + JSON.stringify(exception));
+}
+```
+## AccessibilityExtensionContext.injectGesture
+
+injectGesture(gesturePath: GesturePath, callback: AsyncCallback\<void>): void
+
+Inject a gesture. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type                                    | Mandatory  | Description            |
+| ----------- | ---------------------------------------- | ---- | -------------- |
+| gesturePath | [GesturePath](js-apis-accessibility-GesturePath.md#gesturepath) | Yes   | Path of the gesture to inject.    |
+| callback    | AsyncCallback&lt;void&gt;                  | Yes   | Callback used to return the result.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300003 | Do not have accessibility right for this operation. |
+
+**Example**
+
+```ts
+import GesturePath from "@ohos.accessibility.GesturePath";
+import GesturePoint from '@ohos.accessibility.GesturePoint';
+let gesturePath = new GesturePath.GesturePath(100);
+try {
+    for (let i = 0; i < 10; i++) {
+        let gesturePoint = new GesturePoint.GesturePoint(100, i * 200);
+        gesturePath.points.push(gesturePoint);
+    }
+    axContext.injectGesture(gesturePath, (err, data) => {
+        if (err) {
+            console.error('failed to inject gesture, because ' + JSON.stringify(err));
+            return;
+        }
+        console.info('inject gesture success');
+    });
+} catch (exception) {
+    console.error('failed to inject gesture, because ' + JSON.stringify(exception));
+}
+```
+## AccessibilityElement<sup>9+</sup>
+
+Defines the accessibilityelement. Before calling APIs of **AccessibilityElement**, you must call [AccessibilityExtensionContext.getFocusElement()](#accessibilityextensioncontextgetfocuselement) or [AccessibilityExtensionContext.getWindowRootElement()](#accessibilityextensioncontextgetwindowrootelement) to obtain an **AccessibilityElement** instance.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+## attributeNames
+
+attributeNames\<T extends keyof ElementAttributeValues>(): Promise\<Array\<T>>;
+
+Obtains all attribute names of this element. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Return value**
+
+| Type                                      | Description                      |
+| ---------------------------------------- | ------------------------ |
+| Promise&lt;Array&lt;T&gt;&gt; | Promise used to return all attribute names of the element.|
+
+**Example**
+
+```ts
+let rootElement;
+let attributeNames;
+rootElement.attributeNames().then((data) => {
+    console.log('get attribute names success');
+    attributeNames = data;
+}).catch((err) => {
+    console.log('failed to get attribute names, because '  + JSON.stringify(err));
+});
+```
+## attributeNames
+
+attributeNames\<T extends keyof ElementAttributeValues>(callback: AsyncCallback\<Array\<T>>): void;
+
+Obtains all attribute names of this element. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type                                    | Mandatory  | Description            |
+| ----------- | ---------------------------------------- | ---- | -------------- |
+| callback    | AsyncCallback&lt;Array&lt;T&gt;&gt;                  | Yes   | Callback used to return all attribute names of the element.|
+
+**Example**
+
+```ts
+let rootElement;
+let attributeNames;
+rootElement.attributeNames((err, data) => {
+    if (err) {
+        console.error('failed to get attribute names, because ' + JSON.stringify(err));
+        return;
+    }
+    attributeNames = data;
+    console.info('get attribute names success');
+});
+```
+## AccessibilityElement.attributeValue
+
+attributeValue\<T extends keyof ElementAttributeValues>(attributeName: T): Promise\<ElementAttributeValues[T]>;
+
+Obtains the attribute value based on an attribute name. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type                                    | Mandatory  | Description            |
+| ----------- | ---------------------------------------- | ---- | -------------- |
+| attributeName | T | Yes   | Attribute name.    |
+
+**Return value**
+
+| Type                                      | Description                      |
+| ---------------------------------------- | ------------------------ |
+| Promise&lt;ElementAttributeValues[T]&gt; | Promise used to return the attribute value.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300004 | This property does not exist. |
+
+**Example**
+
+```ts
+let attributeName = 'name';
+let attributeValue;
+let rootElement;
+try {
+    rootElement.attributeValue(attributeName).then((data) => {
+        console.log('get attribute value by name success');
+        attributeValue = data;
+    }).catch((err) => {
+        console.log('failed to get attribute value, because '  + JSON.stringify(err));
+    });
+} catch (exception) {
+    console.log('failed to get attribute value, because ' + JSON.stringify(exception));
+}
+```
+## AccessibilityElement.attributeValue
+
+attributeValue\<T extends keyof ElementAttributeValues>(attributeName: T, 
+    callback: AsyncCallback\<ElementAttributeValues[T]>): void;
+
+Obtains the attribute value based on an attribute name. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type                                    | Mandatory  | Description            |
+| ----------- | ---------------------------------------- | ---- | -------------- |
+| attributeName | T | Yes   | Attribute name.    |
+| callback    | AsyncCallback&lt;ElementAttributeValues[T]&gt;   | Yes   | Callback used to return the attribute value.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300004 | This property does not exist. |
+
+**Example**
+
+```ts
+let rootElement;
+let attributeValue;
+let attributeName = 'name';
+try {
+    rootElement.attributeValue(attributeName, (err, data) => {
+        if (err) {
+            console.error('failed to get attribute value, because ' + JSON.stringify(err));
+            return;
+        }
+        attributeValue = data;
+        console.info('get attribute value success');
+    });
+} catch (exception) {
+    console.log('failed to get attribute value, because ' + JSON.stringify(exception));
+}
+```
+## actionNames
+
+actionNames(): Promise\<Array\<string>>;
+
+Obtains the names of all actions supported by this element. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Return value**
+
+| Type                                      | Description                      |
+| ---------------------------------------- | ------------------------ |
+| Promise&lt;Array&lt;string&gt;&gt; | Promise used to return the names of all actions supported by the element.|
+
+**Example**
+
+```ts
+let rootElement;
+let actionNames;
+rootElement.actionNames().then((data) => {
+    console.log('get action names success');
+    actionNames = data;
+}).catch((err) => {
+    console.log('failed to get action names because '  + JSON.stringify(err));
+});
+```
+## actionNames
+
+actionNames(callback: AsyncCallback\<Array\<string>>): void;
+
+Obtains the names of all actions supported by this element. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type                                    | Mandatory  | Description            |
+| ----------- | ---------------------------------------- | ---- | -------------- |
+| callback    | AsyncCallback&lt;Array&lt;string&gt;&gt;   | Yes   | Callback used to return the names of all actions supported by the element.|
+
+**Example**
+
+```ts
+let rootElement;
+let actionNames;
+rootElement.actionNames((err, data) => {
+    if (err) {
+        console.error('failed to get action names, because ' + JSON.stringify(err));
+        return;
+    }
+    actionNames = data;
+    console.info('get action names success');
+});
+```
+## performAction
+
+performAction(actionName: string, parameters?: object): Promise\<void>;
+
+Performs an action based on the specified action name. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type                                    | Mandatory  | Description            |
+| ----------- | ---------------------------------------- | ---- | -------------- |
+| actionName | string | Yes   | Action name.    |
+| parameters | object | No   | Parameter required for performing the target action.    |
+
+**Return value**
+
+| Type                                      | Description                      |
+| ---------------------------------------- | ------------------------ |
+| Promise&lt;void&gt; | Promise that returns no value.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300005 | This action is not supported. |
+
+**Example**
+
+```ts
+let rootElement;
+try {
+    rootElement.performAction('action').then((data) => {
+        console.info('perform action success');
+    }).catch((err) => {
+        console.log('failed to perform action, because '  + JSON.stringify(err));
+    });
+} catch (exception) {
+    console.log('failed to perform action, because ' + JSON.stringify(exception));
+}
+```
+## performAction
+
+performAction(actionName: string, callback: AsyncCallback\<void>): void;
+
+Performs an action based on the specified action name. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type                                    | Mandatory  | Description            |
+| ----------- | ---------------------------------------- | ---- | -------------- |
+| actionName | string | Yes   | Attribute name.    |
+| callback | AsyncCallback&lt;void&gt; | Yes   | Callback used to return the result.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300005 | This action is not supported. |
+
+**Example**
+
+```ts
+let rootElement;
+try {
+    rootElement.performAction('action', (err, data) => {
+        if (err) {
+            console.error('failed to perform action, because ' + JSON.stringify(err));
+            return;
+        }
+        console.info('perform action success');
+    });
+} catch (exception) {
+    console.log('failed to perform action, because ' + JSON.stringify(exception));
+}
+```
+## performAction
+
+performAction(actionName: string, parameters: object, callback: AsyncCallback\<void>): void;
+
+Performs an action based on the specified action name. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type                                    | Mandatory  | Description            |
+| ----------- | ---------------------------------------- | ---- | -------------- |
+| actionName | string | Yes   | Action name.    |
+| parameters | object | Yes   | Parameter required for performing the target action.    |
+| callback | AsyncCallback&lt;void&gt; | Yes   | Callback used to return the result.|
+
+**Error codes**
+
+For details about the error codes, see [Accessibility Error Codes](../errorcodes/errorcode-accessibility.md).
+
+| ID| Error Message|
+| ------- | -------------------------------- |
+| 9300005 | This action is not supported. |
+
+**Example**
+
+```ts
+let rootElement;
+let actionName = 'action';
+let parameters = {
+    'setText': 'test text'
+};
+try {
+    rootElement.performAction(actionName, parameters, (err, data) => {
+        if (err) {
+            console.error('failed to perform action, because ' + JSON.stringify(err));
+            return;
+        }
+        console.info('perform action success');
+    });
+} catch (exception) {
+    console.log('failed to perform action, because ' + JSON.stringify(exception));
+}
+```
+## findElement('content')
+
+findElement(type: 'content', condition: string): Promise\<Array\<AccessibilityElement>>;
+
+Queries the element information of the **content** type. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type                                    | Mandatory  | Description            |
+| ----------- | ---------------------------------------- | ---- | -------------- |
+| type | string | Yes   | Information type. The value is fixed at **'content'**.    |
+| condition | string | Yes   | Search criteria.    |
+
+**Return value**
+
+| Type                                      | Description                      |
+| ---------------------------------------- | ------------------------ |
+| Promise&lt;Array&lt;AccessibilityElement&gt;&gt; | Promise used to return the result.|
+
+**Example**
+
+```ts
+let rootElement;
+let type = 'content';
+let condition = 'keyword';
+let elements;
+try {
+    rootElement.findElement(type, condition).then((data) => {
+        elements = data;
+        console.log('find element success');
+    }).catch((err) => {
+        console.log('failed to find element, because '  + JSON.stringify(err));
+    });
+} catch (exception) {
+    console.log('failed to find element, because ' + JSON.stringify(exception));
+}
+```
+## findElement('content')
+
+findElement(type: 'content', condition: string, callback: AsyncCallback\<Array\<AccessibilityElement>>): void;
+
+Queries the element information of the **content** type. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type                                    | Mandatory  | Description            |
+| ----------- | ---------------------------------------- | ---- | -------------- |
+| type | string | Yes   | Information type. The value is fixed at **'content'**.    |
+| condition | string | Yes   | Search criteria.    |
+| callback | AsyncCallback&lt;Array&lt;AccessibilityElement&gt;&gt; | Yes   | Callback used to return the result.|
+
+**Example**
+
+```ts
+let rootElement;
+let type = 'content';
+let condition = 'keyword';
+let elements;
+try {
+    rootElement.findElement(type, condition, (err, data) => {
+        if (err) {
+            console.error('failed to find element, because ' + JSON.stringify(err));
+            return;
+        }
+        elements = data;
+        console.info('find element success');
+    });
+} catch (exception) {
+    console.log('failed to find element, because ' + JSON.stringify(exception));
+}
+```
+## findElement('focusType')
+
+findElement(type: 'focusType', condition: FocusType): Promise\<AccessibilityElement>;
+
+Queries the element information of the **focusType** type. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type                                    | Mandatory  | Description            |
+| ----------- | ---------------------------------------- | ---- | -------------- |
+| type | string | Yes   | Information type. The value is fixed at **'focusType'**.    |
+| condition | [FocusType](#focustype) | Yes   | Enumerates the focus types.    |
+
+**Return value**
+
+| Type                                      | Description                      |
+| ---------------------------------------- | ------------------------ |
+| Promise&lt;AccessibilityElement&gt; | Promise used to return the result.|
+
+**Example**
+
+```ts
+let rootElement;
+let type = 'focusType';
+let condition = 'normal';
+let element;
+try {
+    rootElement.findElement(type, condition).then((data) => {
+        element = data;
+        console.log('find element success');
+    }).catch((err) => {
+        console.log('failed to find element, because '  + JSON.stringify(err));
+    });
+} catch (exception) {
+    console.log('failed to find element, because ' + JSON.stringify(exception));
+}
+```
+## findElement('focusType')
+
+findElement(type: 'focusType', condition: FocusType, callback: AsyncCallback\<AccessibilityElement>): void;
+
+Queries the element information of the **focusType** type. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type                                    | Mandatory  | Description            |
+| ----------- | ---------------------------------------- | ---- | -------------- |
+| type | string | Yes   | Information type. The value is fixed at **'focusType'**.    |
+| condition | [FocusType](#focustype) | Yes   | Enumerates the focus types.    |
+| callback | AsyncCallback&lt;AccessibilityElement&gt; | Yes   | Callback used to return the result.|
+
+**Example**
+
+```ts
+let rootElement;
+let type = 'focusType';
+let condition = 'normal';
+let element;
+try {
+    rootElement.findElement(type, condition, (err, data) => {
+        if (err) {
+            console.error('failed to find element, because ' + JSON.stringify(err));
+            return;
+        }
+        element = data;
+        console.info('find element success');
+    });
+} catch (exception) {
+    console.log('failed to find element, because ' + JSON.stringify(exception));
+}
+```
+## findElement('focusDirection')
+
+findElement(type: 'focusDirection', condition: FocusDirection): Promise\<AccessibilityElement>;
+
+Queries the element information of the **focusDirection** type. This API uses a promise to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type                                    | Mandatory  | Description            |
+| ----------- | ---------------------------------------- | ---- | -------------- |
+| type | string | Yes   | Information type. The value is fixed at **'focusDirection'**.    |
+| condition | [FocusDirection](#focusdirection) | Yes   | Enumerates the focus directions.    |
+
+**Return value**
+
+| Type                                      | Description                      |
+| ---------------------------------------- | ------------------------ |
+| Promise&lt;AccessibilityElement&gt; | Promise used to return the result.|
+
+**Example**
+
+```ts
+let rootElement;
+let type = 'focusDirection';
+let condition = 'up';
+let element;
+try {
+    rootElement.findElement(type, condition).then((data) => {
+        element = data;
+        console.log('find element success');
+    }).catch((err) => {
+        console.log('failed to find element, because '  + JSON.stringify(err));
+    });
+} catch (exception) {
+    console.log('failed to find element, because ' + JSON.stringify(exception));
+}
+```
+## findElement('focusDirection')
+
+findElement(type: 'focusDirection', condition: FocusDirection, callback: AsyncCallback\<AccessibilityElement>): void;
+
+Queries the element information of the **focusDirection** type. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.BarrierFree.Accessibility.Core
+
+**Parameters**
+
+| Name        | Type                                    | Mandatory  | Description            |
+| ----------- | ---------------------------------------- | ---- | -------------- |
+| type | string | Yes   | Information type. The value is fixed at **'focusDirection'**.    |
+| condition | [FocusDirection](#focusdirection) | Yes   | Direction of the next focus element.    |
+| callback | AsyncCallback&lt;AccessibilityElement&gt; | Yes   | Callback used to return the result.|
+
+**Example**
+
+```ts
+let rootElement;
+let type = 'focusDirection';
+let condition = 'up';
+let elements;
+try {
+    rootElement.findElement(type, condition, (err, data) => {
+        if (err) {
+            console.error('failed to find element, because ' + JSON.stringify(err));
+            return;
+        }
+        elements = data;
+        console.info('find element success');
+    });
+} catch (exception) {
+    console.log('failed to find element, because ' + JSON.stringify(exception));
+}
+```

en/application-dev/reference/errorcodes/errorcode-accessibility.md

+# Accessibility Error Codes
+
+## 9300001 Invalid Bundle Name or Ability Name
+
+**Error Message**
+
+Invalid bundle name or ability name.
+
+**Description**
+
+This error code is reported when the entered bundle name or ability name is invalid.
+
+**Possible Causes**
+
+ 
+1. The bundle name does not exist.
+2. The bundle does not contain the target ability.
+
+**Solution**
+
+1. Verify the bundle name.
+2. Check whether the ability name corresponding to the bundle name is correct.
+
+## 9300002 Target Ability Already Enabled
+
+**Error Message**
+
+Target ability already enabled.
+
+**Description**
+
+This error code is reported when the target ability is already enabled.
+
+**Possible Causes**
+
+The target ability is already enabled and cannot be enabled again.
+
+**Solution**
+
+1. Stop the target Ability.
+2. Re-enable the target ability.
+
+## 9300003 No Accessibility Permission to Perform the Operation
+
+**Error Message**
+
+Do not have accessibility right for this operation.
+
+**Description**
+
+This error code is reported when an application performs an accessibility operation for which the related permission has not been granted.
+
+**Possible Causes**
+
+The permission for performing the accessibility operation is not granted when the accessibility application is enabled.
+
+**Solution**
+
+1. Request from the user the permission for performing the accessibility operation, stating the reason for the request.
+2. Have the accessibility application re-enabled and the required accessibility operation enabled.
+
+## 9300004 Attribute Not Found
+
+**Error Message**
+
+This property does not exist.
+
+**Description**
+
+This error code is reported when the entered attribute of the accessibility element does not exist.
+
+**Possible Causes**
+
+The attribute does not exist in the accessibility element.
+
+**Solution**
+
+Make sure the accessibility element has the target attribute.
+
+## 9300005 Operation Not Supported
+
+**Error Message**
+
+This action is not supported.
+
+**Description**
+
+This error code is reported when the application performs an operation that is not supported by the accessibility element.
+
+**Possible Causes**
+
+The accessibility element does not support the target operation.
+
+**Solution**
+
+Make sure the operation is included in the list of operations supported by the accessibility element.